The Cabrillo Astronomy Department has a small planetarium below room 706 in the Natural and Applied Sciences 700 building. It is used to demonstrate the motions of the earth and sky for astronomy students, and also for planetarium shows for community groups. The projector is an old Spitz A3P, upgraded in 1990 with a zenon light source. The original hard wooden chairs were taken out and replaced by the volunteer efforts of the Cabrillo Astronomy Club, especially Tom Trumbull, with padded chairs salvaged from a remodelled court room in San Jose.